updated 04:50 pm EST, Mon February 1, 2010
TDK intros Kleer wireless headphones
TDK Japan on Monday released its TH-WR700 headphones that use Kleer's wireless technology. A sender unit connects to an iPhone, iPod or other device with a 3.5mm headphone jack and transmits 16-bit/44.1KHz audio using the 2.4GHz frequency to a built-in receiver in the folding headphones. Both phone calls and music will pass through from any compatible products.
The transmitter can also send the audio to up to four users at a time. The headphones need four AA batteries, on which they are said to last as long as 40 hours. The wireless range is about 33 feet. Each ear cup has a 34mm driver, and the set's sound pressure sensitivity is set at 108dB/mW. Frequency response is 20~20,000Hz, while impedance is 32 Ohms.
The TH-WR700 will ship in Japan on March 1st, though pricing hasn't yet been set. The headphones should arrive in North America soon after.